I've been trying to solve this question for ages but I seem to get the same (but wrong) answer ....
The equation I derive is the amount remaining = 200 000 x r^n - 1051.41 (r^n - 1)/(r - 1) [where r = interest = 3013 / 3000]. However, when I try what it is after 6 years (72 months - isn't it just subbing it in?), I keep on getting $184 428.94. That doesn't seem right at all.... which made my answer for the final question really really off (19 years?!??!)
Thanks for your help!